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authorPhilipp Tanlak <philipp.tanlak@gmail.com>2025-11-24 20:54:57 +0100
committerPhilipp Tanlak <philipp.tanlak@gmail.com>2025-11-24 20:57:48 +0100
commitb1e2c8fd5cb5dfa46bc440a12eafaf56cd844b1c (patch)
tree49d360fd6cbc6a2754efe93524ac47ff0fbe0f7d /node_modules/@alloc/quick-lru/index.d.ts
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+declare namespace QuickLRU {
+ interface Options<KeyType, ValueType> {
+ /**
+ The maximum number of milliseconds an item should remain in the cache.
+
+ @default Infinity
+
+ By default, `maxAge` will be `Infinity`, which means that items will never expire.
+ Lazy expiration upon the next write or read call.
+
+ Individual expiration of an item can be specified by the `set(key, value, maxAge)` method.
+ */
+ readonly maxAge?: number;
+
+ /**
+ The maximum number of items before evicting the least recently used items.
+ */
+ readonly maxSize: number;
+
+ /**
+ Called right before an item is evicted from the cache.
+
+ Useful for side effects or for items like object URLs that need explicit cleanup (`revokeObjectURL`).
+ */
+ onEviction?: (key: KeyType, value: ValueType) => void;
+ }
+}
+
+declare class QuickLRU<KeyType, ValueType>
+ implements Iterable<[KeyType, ValueType]> {
+ /**
+ The stored item count.
+ */
+ readonly size: number;
+
+ /**
+ Simple ["Least Recently Used" (LRU) cache](https://en.m.wikipedia.org/wiki/Cache_replacement_policies#Least_Recently_Used_.28LRU.29).
+
+ The instance is [`iterable`](https://developer.mozilla.org/en/docs/Web/JavaScript/Reference/Iteration_protocols) so you can use it directly in a [`for…of`](https://developer.mozilla.org/en/docs/Web/JavaScript/Reference/Statements/for...of) loop.
+
+ @example
+ ```
+ import QuickLRU = require('quick-lru');
+
+ const lru = new QuickLRU({maxSize: 1000});
+
+ lru.set('πŸ¦„', '🌈');
+
+ lru.has('πŸ¦„');
+ //=> true
+
+ lru.get('πŸ¦„');
+ //=> '🌈'
+ ```
+ */
+ constructor(options: QuickLRU.Options<KeyType, ValueType>);
+
+ [Symbol.iterator](): IterableIterator<[KeyType, ValueType]>;
+
+ /**
+ Set an item. Returns the instance.
+
+ Individual expiration of an item can be specified with the `maxAge` option. If not specified, the global `maxAge` value will be used in case it is specified in the constructor, otherwise the item will never expire.
+
+ @returns The list instance.
+ */
+ set(key: KeyType, value: ValueType, options?: {maxAge?: number}): this;
+
+ /**
+ Get an item.
+
+ @returns The stored item or `undefined`.
+ */
+ get(key: KeyType): ValueType | undefined;
+
+ /**
+ Check if an item exists.
+ */
+ has(key: KeyType): boolean;
+
+ /**
+ Get an item without marking it as recently used.
+
+ @returns The stored item or `undefined`.
+ */
+ peek(key: KeyType): ValueType | undefined;
+
+ /**
+ Delete an item.
+
+ @returns `true` if the item is removed or `false` if the item doesn't exist.
+ */
+ delete(key: KeyType): boolean;
+
+ /**
+ Delete all items.
+ */
+ clear(): void;
+
+ /**
+ Update the `maxSize` in-place, discarding items as necessary. Insertion order is mostly preserved, though this is not a strong guarantee.
+
+ Useful for on-the-fly tuning of cache sizes in live systems.
+ */
+ resize(maxSize: number): void;
+
+ /**
+ Iterable for all the keys.
+ */
+ keys(): IterableIterator<KeyType>;
+
+ /**
+ Iterable for all the values.
+ */
+ values(): IterableIterator<ValueType>;
+
+ /**
+ Iterable for all entries, starting with the oldest (ascending in recency).
+ */
+ entriesAscending(): IterableIterator<[KeyType, ValueType]>;
+
+ /**
+ Iterable for all entries, starting with the newest (descending in recency).
+ */
+ entriesDescending(): IterableIterator<[KeyType, ValueType]>;
+}
+
+export = QuickLRU;